This question has been asked here before, but the author wasn't very clear and got no answers (1st ref). Why aren't my combobox items displaying correctly? It is almost like they are there, but not connected to the combobox (notice my label, it shows up halfway down the page instead of right underneath the combobox when I run it). I get no errors on the page, which is good (different than when I tried doing this in VS2005), and the combobox displays fine, but when I click it, nothing is there.
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:ComboBox ID="ComboBox1" runat="server" AutoPostBack="true"
DropDownStyle="DropDownList">
<asp:ListItem>thisis</asp:ListItem>
<asp:ListItem>mynetwork</asp:ListItem>
<asp:ListItem>getoffmyjunk</asp:ListItem>
<asp:ListItem>itsmine</asp:ListItem>
<asp:ListItem>illkillyou</asp:ListItem>
<asp:ListItem>forrealz</asp:ListItem>
<asp:ListItem>what</asp:ListItem>
<asp:ListItem>didyousaysomething</asp:ListItem>
<asp:ListItem>didn'tthinkso</asp:ListItem>
<asp:ListItem>meh</asp:ListItem>
</asp:ComboBox>
<br />
<asp:Label ID="lbl" runat="server">default text</asp:Label>
</div>
</form>
</body>
</html>
https://stackoverflow.com/questions/4322922/combo-box-items-does-not-display-below-of-combo-box-why
I'm having the same problem as this guy: http://p2p.wrox.com/book-asp-net-ajax-programmers-reference-asp-net-2-0-asp-net-3-5-isbn-978-0-470-10998-4/80267-ajax-combobox-not-displaying-item-list-correctly.html
Your syntax looks to be incorrect for the ComboBox control. You want to use the Text and Value parameters in order to get the options to display. You'll want it to look like this:
<asp:ComboBox ID="ComboBox1" runat="server" AutoPostBack="true" DropDownStyle="DropDownList">
<asp:ListItem Text="thisis" Value="thisis"></asp:ListItem>
<asp:ListItem Text="mynetwork" Value="mynetwork"></asp:ListItem>
<asp:ListItem Text="getoffmyjunk" Value="getoffmyjunk"></asp:ListItem>
</asp:ComboBox>
Note: You may also be running into issues with your control tag declaration. For example, when I import the AJAX Control Toolkit into my applications, and add the proper references, I wind up using the tag "cc1" for all of the AJAX Control Toolkit controls. You may need to double check these references as well.
Use toolkitscriptmanager xD
wanted to give the answer to Tim, but he won't put his comment as an answer ;;